I got this from the Literate Haskell page on the Emacs Wiki[1]:
\usepackage{listings}
\lstloadlanguages{Haskell}
\lstnewenvironment{code}
{\lstset{}%
\csname [EMAIL PROTECTED]
{\csname [EMAIL PROTECTED]
\lstset{
basicstyle=\small\ttfamily,
flexiblecolumns=false,
basewidth={0.5em,0.45em},
literate={+}{{$+$}}1 {/}{{$/$}}1 {*}{{$*$}}1 {=}{{$=$}}1
{>}{{$>$}}1 {<}{{$<$}}1 {\\}{{$\lambda$}}1
{->}{{$\rightarrow$}}2 {>=}{{$\geq$}}2 {<-}{{$\leftarrow$}}2
{<=}{{$\leq$}}2 {=>}{{$\Rightarrow$}}2
{\ .}{{$\circ$}}2 {\ .\ }{{$\circ$}}2
{>>}{{>>}}2 {>>=}{{>>=}}2
{|}{{$\mid$}}1
}
That replaces various strings (including ++) with their symbol
equivalents and generally makes things quite pretty.
Tom
[1]: http://haskell.org/hawiki/LiterateProgramming
On 6/8/07, Andrew Coppin <[EMAIL PROTECTED]> wrote:
Does anybody know what the magical LaTeX command is to turn (say) "++"
into two overprinted pluses? (As seems to be fashionable...)
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